Vacuum Insulation Lid

ABSTRACT

A vacuum insulation lid or plug comprises stainless steel housing. The housing has a vacuum cavity and has an evacuation hole on it. The evacuation hole has a sealing solder seal block on it. The housing includes a downwardly opening outer cover and a downwardly opening inner cap, the outer cover and the inner cap are welded together with an inner cavity that is formed between the outer cover and the inner cap, and the inner cap is pressed to form an internal thread. Or, the housing comprises an upper cover and a lower cylinder, the lower end of the lower cylinder is closed, the outer diameter of the lower cylinder is smaller than the outer diameter of the upper cover, the upper cover and the lower cylinder are connected by welding and the interior of the lower internal cylinder and the interior of the upper cover form the inner cavity, the side wall of the lower cylinder is pressed to form an external thread and a groove, and a waterproof seal ring sets in the groove.

FIELD OF THE INVENTION

The present relates generally to accessory for heat insulating cup, andspecifically, a lid for vacuum insulation cup.

BACKGROUND OF THE INVENTION

Stainless steel insulation cup with internal vacuum cavity has beenwidely used. Because of its insulation effect, this kind of insulationcups is popular. However, the lid of the insulation cup is not insulatedby vacuum cavity. As a result, the heat loses through the lid and theinsulating effect of the insulation cup body is weakened.

SUMMARY OF THE INVENTION

In order to overcome the aforementioned shortcomings, a vacuuminsulation lid has the same stainless steel vacuum structure and thesame thermal insulation effect as a vacuum insulation cup body.

The technical approach of the present invention is: the vacuuminsulation lid comprises stainless steel housing, the housing has avacuum cavity, the housing has an evacuation hole on it, and theevacuation hole has a sealing solder seal block on it.

The said housing includes a downwardly opening cover and a downwardlyopening inner cap, the cover and the inner cover are welded togetherwith an inner cavity is formed between the cover and the inner cap, andthe inner cap is pressed to form an internal thread.

The said cover has a pit on its top and the evacuation hole is locatedinside the pit.

The said housing comprises an upper cover and a lower cylinder which arestamped and formed from stainless steel sheet, the lower end of thelower cylinder is closed, the outer diameter of the lower cylinder issmaller than the outer diameter of the upper cover, the upper cover andthe lower cylinder are connected by welding and the interior of thelower internal cylinder and the interior of the upper cover form theinner cavity, the side wall of the lower cylinder is pressed to form anexternal thread and a groove, and a waterproof seal ring sets in thegroove.

The advantage of vacuum insulation lid according to the presentinvention is better insulation effect. The vacuum insulated lid of thepresent invention has a vacuum cavity. As a result, both the lid and thevacuum insulation cup body have vacuum insulation effect and thematerials in the cup can get a full range of insulation. At the sametime, the insulation lid uses stainless steel instead of plasticmaterial to avoid the release of the plastic molecules into the liquidin the cup. Thus, the lid has a higher level of health standard. Thestainless steel structure of the lid is also stronger and more durableand uniforms the color of the lid and the cup body.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention is further described through the figures andexamples as below:

FIG. 1 is a main cross-sectional view of Example 1 of the presentinvention;

FIG. 2 is a main cross-sectional view of Example 1 of the presentinvention when in use;

FIG. 3 is a main cross-sectional view of Example 2 of the presentinvention;

FIG. 4 is an enlarged view of Part A of FIG. 1;

FIG. 5 is a main cross-sectional view of Example 3 of the presentinvention;

FIG. 6 is a main cross-sectional view (partial) of a vacuum insulationlid of the present invention that comprises of Example 2 and Example 3when used in conjunction.

Figures: (10) housing; (101) outer cover; (1011) pit; (102) inner cap;(1021) internal thread; (103) upper cover; (104) lower cylinder; (1041)external thread; (1042) groove; (20) sealing solder seal block; (30)waterproof seal ring.

DETAILED DESCRIPTION OF THE DRAWINGS EXAMPLE 1

As FIGS. 1 and 2 show, the vacuum insulation lid comprises stainlesssteel housing 10. The housing 10 has a vacuum cavity 11, the housing 10has an evacuation hole 12 on it, and the evacuation hole 12 has asealing solder seal block 20 on it. That is, the cavity 11 is vacuumizedthrough the evacuation hole 12 and using the sealing solder seal block20 seals the evacuation hole 12.

More specifically, the housing 10 includes a downwardly opening outercover 101 and a downwardly opening inner cap 102. The outer cover 101and the inner cover 102 are welded together with an inner cavity 11 isformed between the outer cover 101 and the inner cap 102. For instance,the lower edge of the outer cover 101 and the lower edge of the innercap 102 are welded together. As such, the housing 10 forms a double wallsealing structure. The evacuation hole 12 may be located at the upperend face of the outer cover 101. And, the inner cap 102 is pressed toform an internal thread 1021. Clearly, the internal thread 1021 isscrewed on the mouth of a cup and the cup has external threadsessentially.

Further, the outer cover 101 has a pit 1011 on its top and theevacuation hole 12 is located inside the pit 1011. This facilitates thevacuumization operation of the inner cavity 11. Also, after thevacuumization is completed and the evacuation hole 12 is sealed, thedecorative piece may be provided on the pit 1011 to prevent that theevacuation hole 12 is exposed and the sealing solder seal block 20 isloosed after direct hit, which results the cavity 11 is not vacuum anymore.

Thus, the vacuum inside the insulation lid improves the thermalinsulation effect of the lid and prevents the more rapid disseminationof internal heat of the insulation cup.

EXAMPLE 2

As FIG. 3 and FIG. 4 show, the only difference to Example 1 is: thedepth of the inner cylinder 104 is slightly higher, such as at least 40mm. Thus, the vacuum insulation lid not only has the basic function ofinsulation effect, but also may be used as insulated container and isnot too hot to be held.

EXAMPLE 3

As FIG. 5 show, the vacuum insulation lid comprises a stainless steelhousing 10. The housing 10 has a vacuum cavity 11, the housing 10 has anevacuation hole 12 on it, and the evacuation hole 12 has a sealingsolder seal block 20 on it.

Specifically, the housing 10 comprises an upper cover 103 and a lowercylinder 104 which are stamped and formed from stainless steel sheet,the lower end of the lower cylinder 104 is closed, the outer diameter ofthe lower cylinder 104 is smaller than the outer diameter of the uppercover 103, the upper cover 103 and the lower cylinder 104 are connectedby welding, and the interior of the lower internal cylinder 104 and theinterior of the upper cover 103 form the inner cavity 11. For instance,the lower edge of the upper cover 103 and the upper edge of the lowercylinder 104 are welded together. As such, the evacuation hole 12 may belocated at the upper end face of the upper cover 103 or may be locatedat the bottom end face of the lower cylinder 104. And, the lowercylinder 104 is pressed to form an external thread 1041 and a groove1042. A waterproof seal ring 30 sets in the groove 1042. Clearly, theexternal thread 1041 is screwed on the mouth of a cup and the cup hasinternal threads essentially.

Thus, the insulation lid becomes an inner lid, so that its lowercylinder 104 is located in the mouth of a cup and further increases thethermal insulation effect of the insulation lid. Of course, the mouth ofthe cup should have step that the seal ring 30 is tightly pressedagainst to play the role of waterproof.

Note that, as shown in FIG. 6, the double wall vacuum insulation lid asdescribed in Example 2 and the inner plug vacuum insulated lid asdescribed in Example 3 may not only simultaneously be applied onto acup, but also separately be used on a cup. That is, the inner plug lidis screwed inside the mouth of the cup and the double wall lid isscrewed outside of the cup. Thus, not only better insulation effect isachieved, but also while the double wall outer lid is used a container,the inner plug lid still plays the role of vacuum insulation and theindustry technical challenge, that a cup has no use of plastic parts, isovercome.

Throughout the description and claims of this specification, the words“comprise” and “contain” and variations of the words, for example“comprising” and “comprises”, means “including but not limited to”, andis not intended to (and does not) exclude other moieties, additives,components, integers or steps.

Throughout the description and claims of this specification, thesingular encompasses the plural unless the context otherwise requires.In particular, where the indefinite article is used, the specificationis to be understood as contemplating plurality as well as singularity,unless the context requires otherwise.

Features, integers, characteristics, compounds, chemical moieties orgroups described in conjunction with a particular aspect, embodiment orexample of the invention are to be understood to be applicable to anyother aspect, embodiment or example described herein unless incompatibletherewith.

What is claimed is:
 1. Vacuum insulation lid, comprising stainless steelhousing (10), wherein: the said housing (10) has a vacuum cavity (11),the said housing (10) has an evacuation hole (12) on it, and theevacuation hole(12) has a sealing solder seal block (20) on it.
 2. Thevacuum insulation lid according to claim 1, wherein the said housing(10) includes a downwardly opening outer cover (101) and a downwardlyopening inner cap (102), the outer cover (101) and the inner cap (102)are welded together so that an inner cavity (11) is formed between theouter cover (101) and the inner cap (102), and the inner cap (102) ispressed to form an internal thread (1021) .
 3. The vacuum insulated lidaccording to claim 2, wherein the outer cover (101) has a pit (1011) onits top and the evacuation hole (12) is located inside the pit (1011).4. The vacuum insulated lid according to claim 1, wherein the saidhousing (10) comprises an upper cover (103) and a lower cylinder (104)which are stamped and formed from stainless steel sheet, the lower endof the lower cylinder (104) is closed and the outer diameter of thelower cylinder (104) is smaller than the outer diameter of the uppercover (103), the upper cover (103) and the lower cylinder (104) areconnected by welding and the interior of the lower internal cylinder(104) and the interior of the upper cover (103) form the inner cavity(11), the side wall of the lower cylinder (104) is pressed to form anexternal thread (1041) and a groove (1042), and a waterproof seal ring(30) sets in the groove (1042).